Carrier for braiding machines



Dec. 18, 1951 F. FERRUTA CARRIER FOR BRAIDING MACHINES 2 SHEETS-Sl-iEET1 Filed April 9, 1948 v 1; v W

195-1 F. 'FERRUTA 2,

CARRIER FOR BRAIDING MACHINES Filed April 9, 1948 2 SHEETSSHEET 2 a mFfiancesco Ferry/Ta Patented Dec. 18, 1951 OFFICE CARRIER FOR BRAIDINGMACHINES Francesco Ferruta, Trecate, Italy Application April 9, 1948,Serial No. 19,938 In Italy April 15, 1947 6 Claims.

The present invention refers to carriers for braiding machines, and moreparticularly to devices for providing a practically constant tension ofthe thread fed by the spool on the carrier.

One of the objects of the present invention is to provide a carrier forbraiding machines in which the thread tension is kept at a practicallyconstant value by a thread tension member the travel or displacement ofwhich is particularly reduced.

Another object of the invention is to provide a. carrier for braidingmachines in which the danger of breaking the thread due to friction withthe thread tension member or the sudden variation of thread feeding rateis considerably reduced with respect to the known carriers.

Still another object of the invention is to provide a carrier forbraiding machines in which the friction caused on the thread by thethread tension member can assume different rates in correspondence todifferent positions of the thread tension member depending upon thethread tension.

Another object of the invention is to provide a carrier for braidingmachines having a particularly reduced height owing to the reducedstroke of the thread tension member. The above and other objects of theinvention will appear more clearly from the following detaileddescription of some embodiments of the same given by way of exampleswith reference to the attached drawings in which:

Fig. 1 is a front view of a carrier according to the invention;

Fig. 2 is a sectional view of Fig. 1 through line II1I;

' Fig. '3 is a sectional view of Fig. 2 through line III-III;

Fig. 4 is a sectional view of Fig. 2 through line Fig. 5 is a plan viewof a detail of Fig. 1;

Fig. 6 is a fragmentary modification of Fig. 1;

Fig. 7 is a front view of another form of carrier according to theinvention;

Fig. 8 is a'fragmentary view of the former with the thread tensionmember in a difierent DQSition; r

. Fig. 9 is a plan view of a detail of Fig. '7.

The carrier shown in Figs. 1 to '5 comprises a base I having a verticalspindle 2 and spaced vertical short and long standards 3 and 4,respectively. A sleeve 5 is mounted for rotation on the spindle 2. Thesleeve 5 has a flange 6 on its lower end, said flange having four radialpro-, jections or teeth, Iconstituting a Tratchetwheel.

A spool 8 havingthread 9 is mounted on the a hole therein to accommodatethe standard 4.,

For holding the block In in the correct position, use is made of memberI I consisting of a strip of spring metal providing a V shape mainresilient portion II with lateral upper and lower end portions. Theupper end portion of the member II has a slot I2 which receives theupper flattened extremity I3 of the standard 4, said upper end portionbeing entered in notch I3 in the standard 4, and being held therein byreason of the resiliency of the member II and the fact that the portionII-' bears on the standard 4 as shown in Fig. 1. A hole I4 in the upperend portion of the member I I serves as a thread guide in a manner to beexplained.

A slide I5 disposed below the block I 0 is arranged for up and downmovement on the standards 3 and 4. A helical spring I6 surrounds thestandard I4 interposed between the block I Ii and the slide I5. Theslide I5 has two thread guides or hooks I1 and I8. A hole I9 in adepending lug 20 on the block serves as a third thread guide.

The block II] has a hole therein to slidably accommodate a vertical rod2|. The rod 2| carries a thread guide or hook 24. The lowerend of therod 2| is received in a hole 25 in the base I. A latch 26 is formed onthe rod 2| near its lower end. The latch 26 is disposed between andacted on by wings 21 on the spindle 2. The latch 26 cooperates with theprojections I on the flange 6 when the rod 2I is moved upwardly by thespring 22, and said latch is disengaged from cooperation with theprojections I when the rod 2| is forced downwardly by the reaction ofthe spring 22.

The thread 9 fed from the spool passes through the hole I9, then throughthe thread guides I1, 24, I8 and I 4 to the braiding which is beingmade.

As it is apparent from the drawing, the slide l5 recovers the excess ofthread length during the operation of the carrier and its displacementis the half of the. variation of the thread length, due to the path ofthe thread as shown.

When the slide I5 is near to its uppermost position, the tension of thethread and the correspending reaction of the spring I6 overcome thereaction of the spring 22 and the rod 2| is low: ered causing the latch26 to disengage from the ratched. 6-1, so that the spool turns anddelivers a further length of thread.

A ;Fig. 6 shows a variation of the arrangement of the thread guide 24.In this case the position of this thread guide is below the uppermostposition of the thread guides I1 and l8, so that, when the slide l5rises due to the tension of the thread, the thread guide 24 is relievedfrom the thread and rises under the action of the spring 22; with thisarrangement, of course, the position of the latch 26 on the rod 2| issuch as to engage with the ratchet 6-'! when lifted and to disengagetherefrom when lowered.

The carrier represented by Figs. '7 and 8 differs from the former onesin that the rod 2| and the latch device are missing and the thread guide24 is fixed on the piece l and is so low as to be relieved from thethread when the slide with the thread guides H, I8 is in its uppermostposition, the thread tension being adjusted in this case by a brakedevice. When the position of Fig. 9 is reached, the friction on thethread, which has left the guide 24', is consider ably diminished andthe thread tension overcomes the brake resistance.

The brake device consists of a sleeve 28 loose on the standard 4 andbearing a shoe 29 urged against the thread on the spool 8 by the actionof a torsion spring 30 one end of which is fixed to the sleeve 28 andthe other end is fixed to a crown bush 3|. One of the indentations ofsaid crown bush 3| engages a projection 32' of a plate 32 dovetailed inthe top portion of the standard 4 so that the torque of the crown bushurges the plate 32 into engagement with the standard 4, while theplurality of such indentations affords a quick and easy means forobtaining an accurate regulation of the braking action through thespring 30.

Said spring 30, being both under compression and torsion provides forthe braking force, keeping the crown bush 3| in engagement with theplate 32 and the plate 32 is forced in connection with the standard 4.

The plate 32 is provided with an eyelet 33 actingas the final threadguide.

Having nowv particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is:

1. In a carrier for braiding machines a thread spool spindle mounted ona base, a standard on said base, a slide on said standard having twothread guides, three thread guides supported by said standard, forguiding the thread said thread passing through the first of said threeguides, then through the first of said two guides, then through thesecond of said three guides, then through the second of said two guides,and then through the third of saidthree guides, and resilient meanscushioning the upward movement of said slide.

2. In a carrier for braiding machines a thread spool spindle mounted ona base, a standard on said base, a slide on said standard having twothread guides, and three thread guides carried by said standard one ofwhich is positioned below said first mentioned thread guides when saidslide is in its uppermost position, and resilient means cushioning theupward movement of said slide.

3. In a carrier for braiding machines a thread spool spindle providedwith a ratchet and mounted on a base, a standard on said base, a slideon said standard having two thread guides, three thread guides supportedby said standard, said thread passing through the first of said threeguides, then through the first of said two guides,

4 then through the second of said three guides, then through the'secondof said two guides, and then through the third of said three guides, twoof said three guides being fixed on said standard and the third beingslidable in a direction parallel to said standard, a spring urging saidthird guide in an upward direction, and a latch engaging said ratchetand operatively connected with said slidable guide; Y

4. In a carrier for braiding machines a thread spool spindle providedwith a ratchet wheel and mounted on a base, a standard on said base, aslide on said standard having two thread guides, three thread guidessupported by said standard, said thread passing through the first of,said three guides, then through the first of said two guides, thenthrough the second of said three guides, then through the second of saidtwo guides, and then through the third of said three guides, two of saidthree guides being fixed on said standard and the third being slidablein a direction parallel to said standard, a spring actuated latch toengage said ratchet wheel and connected to said slidable guide, thetension of the thread acting on said last mentioned guide to disengagethe latch from the ratchet wheel.

5. In a carrier for braiding machines a thread spool spindle providedwith a ratchet wheel and mounted on a base, a standard on said base, aslide on said standard having two thread guides, three thread guidessupported by said standard two of which are integral therewith and thethird being slidable in a direction parallel to said standard, a springurging said slidable guide upward to a position below said firstmentioned thread guides when said slide is in its highest position, alatch operatively connected with said slidable thread guide and engagingsaid ratchet wheel when said slidable thread guide is moved down by thethread.

6. In a'carrier for braiding machines a thread spool spindle providedwith a ratchet wheel and mounted on a base, two vertical rods on saidbase having different lengths, a piece resting on the end of the shorterstandard and provided with a hole for the longer standard, a slidehaving two thread guides and sliding on said standard below said piece,helical springs on said standards between said piece and said slide forurging the latter downwardly, two thread guides supported by said pieceone of which is vertically slidable with respect to said piece, a springurging said slidable guide upwardly, a latch connected to said slidableguide and cooperative with said ratchet wheel, and a resilient memberengaging the longer standard above said piece and comprising a furtherthread guide."

FRANCESCO' .FERRUTA.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

